* {
    padding: 0;
    margin: 0;
}

.holes {
    width: 800px;
    height: 600px;
    background-color: aqua;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
}

.holes:hover {
    cursor: url('/img/hammer.ico'), auto;
}

.holes:active {
    cursor: url('/img/hammer.ico'), auto;
}

.hole {
    width: 25%;
    height: 33%;
    position: relative;
	background-image: url(../img/hole.png);
	background-size: 100% 100%;
}

.hole>img {
    width: 100%;
    height: 100%;
    position: absolute;
}

.hole .mouse {
    z-index: 2;
    width: 150px;
    height: 150px;
    top: 15px;
    left: 25px;
	display: none;
}

.hole .boom {
    z-index: 2;
    display: none;
}